Click the template to open it and click +Use template.
Select the bot in which you want to use the template, and click Use template.
Go to the flow Template handling and select the Condition node.
Populate the contains/equal to fields with the names of the respective WhatsApp template.
Then, go to each of the flows and populate the equal to fields with the button names in the respective WhatsApp templates.
Once you have populated the template names and the button names in the condition nodes, the respective flow gets triggered when a user clicks on a response.